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Recycling 3D printing waste

Member Admin

Recycling 3D printing waste is a topic of interest for many of us !

I am lauching this topic so that we can freely exchange knowledge about our common goal. 

Please feel free to ask questions, so that I or someone else can react.

Best regards,

Topic starter Posted : 30/04/2020 11:48 am

Hi Louis,

I saw on your video of extruding filaments on Youtube that you shredded down old filament spools. How did you break them down to fit in the shredder?

Secondly, any tips for shredding PLA when it is really stringy after a failed print? It's near impossible to get it close enough to the shredder. 

Posted : 30/04/2020 4:25 pm
Member Admin

Hello @ellismarshall

I am always glad to help you.
Thank you for watching our video ! (   which I am linking here, for other visitors)

This batch of spools was pre-chopped with an axe, as a matter of fact.
Other methods are possible, such as :
- bigger-scale shredder (which would give a particle size to big for extrusion, but small enough for a fine shredding)
- other tools : saw, cutters

We had to consider the following in the case of PS : 
- the spools were quite big in volume but rather fragile
- polysterene releases toxic fumes when heated up, even at reasonable temperatures 

PLA strings :
I think I see what you mean here. Unfortunately, the metal plates in the hopper have been mounted for safety and make it impossible to push down with a stick. One trick you can maybe do it to unplug the shredder, remove the hopper, carefully place the 'ball' of stringy PLA straight in the teeth (with great care, and wearing cutproof gloves), then place the hopper back on, plug the shredder and start shredding.

Has this been helpful ? 
Please let me know what you think, and I will try to assist you further.

Best regards,

Topic starter Posted : 01/05/2020 1:43 pm

Hi @louis,

Can you recommend any larger scale shredders to break down some of our larger prints into pellets 2-6mm 

a) With the intension of regrinding threw the 3devo shredder.

b) For our larger printer which accepts pellets in this range.

Additionally how would you recommend storing pellets once they have been dried ready for processing? do you use a vacuum storage solution with added desiccators for example, if so which systems could you recommend and if not how would you recommend going about this. 

Many thanks,


Posted : 19/02/2021 3:22 pm